GB1424673A - Vacuum or thermo forming sheet material - Google Patents

Vacuum or thermo forming sheet material

Info

Publication number
GB1424673A
GB1424673A GB1973672A GB1973672A GB1424673A GB 1424673 A GB1424673 A GB 1424673A GB 1973672 A GB1973672 A GB 1973672A GB 1973672 A GB1973672 A GB 1973672A GB 1424673 A GB1424673 A GB 1424673A
Authority
GB
United Kingdom
Prior art keywords
tool
vacuum
sheet material
forming sheet
thermo forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1973672A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pressed Steel Fisher Ltd
Original Assignee
Pressed Steel Fisher Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pressed Steel Fisher Ltd filed Critical Pressed Steel Fisher Ltd
Priority to GB1973672A priority Critical patent/GB1424673A/en
Publication of GB1424673A publication Critical patent/GB1424673A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003—Discharging moulded articles from the mould
    • B29C37/0014—Discharging moulded articles from the mould by flexibly or permanently deforming undercut portions of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/46—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles using fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/34—Moulds for undercut articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1424673 Sheet forming PRESSED STEEL FISHER Ltd 2 July 1973 [26 April 1972] 19736/72 Heading B5A A moulding 16 that has been formed over a forming tool 11, e.g. by vacuum, has an undercut portion (12), Fig. 1, not shown, and is extracted from the tool 11 by blowing air between the tool and the undercut portion to cause it to expand and clear the tool. The non- undercut portion of the moulding is retained on the tool by a hood 15.
GB1973672A 1972-04-26 1972-04-26 Vacuum or thermo forming sheet material Expired GB1424673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1973672A GB1424673A (en) 1972-04-26 1972-04-26 Vacuum or thermo forming sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1973672A GB1424673A (en) 1972-04-26 1972-04-26 Vacuum or thermo forming sheet material

Publications (1)

Publication Number Publication Date
GB1424673A true GB1424673A (en) 1976-02-11

Family

ID=10134345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1973672A Expired GB1424673A (en) 1972-04-26 1972-04-26 Vacuum or thermo forming sheet material

Country Status (1)

Country Link
GB (1) GB1424673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850759A1 (en) * 1978-11-23 1980-06-04 Fraunhofer Ges Forschung Mfg. thermo-formed PVC or polystyrene trays e.g. for eggs - by vacuum deep drawing plastics sheet or film over array to be packaged
GB2187132A (en) * 1986-02-27 1987-09-03 Caravell Manufacturing Limited Method and apparatus for moulding plastic sheet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850759A1 (en) * 1978-11-23 1980-06-04 Fraunhofer Ges Forschung Mfg. thermo-formed PVC or polystyrene trays e.g. for eggs - by vacuum deep drawing plastics sheet or film over array to be packaged
GB2187132A (en) * 1986-02-27 1987-09-03 Caravell Manufacturing Limited Method and apparatus for moulding plastic sheet
GB2187132B (en) * 1986-02-27 1989-11-08 Caravell Manufacturing Limited Method and apparatus for moulding plastic sheet

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees